Burner



d- 1930' w. A. J. KREAGER 1,778,194

BURNER Original Filed Aug. 24, 1928 gwoe'ntoz dam noq Patented Oct. 14, 1930 UNITED STATES PATENT oFI-lca WILLIAM 'A. T. KR EAGEB, 01 DENVER, COLORADO, ASBIGNOB, BY MESH! ASBIGNIINTI, 'IO BARQUE ROYALTY, INC., 01 DENVER. COLORADO, A CORPORATION COLORADO roam original application filed Aug-until 1928,8er1a1 No. 801,884. Divided and this application filed September 17, 1828. Serial No. 808,570.

This invention relates to improvements in burners for use with oil or gas. 'In my co-pending application, Serial No.

' 301,894 filed 24th'day of August, 1928, I have shown, described and claimed a heater for use in connection with the heating of liquids, and have illustrated a burner. This application is a division of the application above identified and relates to the construc- 1 tion of the burner.

It is the object of this invention to produce a very simple burner that can be employed more particularly in connect on with the use of liquid fuels such as crude 011, and which shall havemeans for efiectin a thorough mixture between the fuel an the air so as to obtain a very eflicient utillzationof' the heat values-of the fuel.

This invention briefly described consists in a cylindrical tube, one end of which is connected to a sourceof air under pressure b means of a conduit, the opening throug which is controlled by means of a. valve. Located within the tube are two sets of helical blades, one set being located near each end of'the tube. In the s ace between the two sets of blades a rotatable propeller is mountf ed. This propeller is arranged so it can rotate around the axis of the tube. Means are provided for introducing fuel such as oil or gas between the deflectors at the intake end of the tube and the propeller. The burner is usually provided with a circular flange by means of which it can be secured to the tubular member that forms the combustion chamber.

The fuel is introduced by means of the action of gravity or by means of a pump and is entrained in the air that flows through the burner. When the 'air and fuel strike the propeller they are subject to an agitation that produces an intimate mixture and this mixture is further agitated by the action of the deflector blades at the discharge end of the burner.

Having thus briefly outlined-the invention, the same will now be described in detail, and reference for this purpose will be had to the 50 accompanying drawing in which the preferred embodiment thereof has been illustrated.

Fig. 1 is a View partly in elevation and partly in section showing my improved burner connected with a sourcc of fuel supply and with a fan.

Fig. 2 is a section similar to, that shown in Fig. 1 and shows the burner to a somewhat enlarged scale. a

Fig. 3 is a section taken on line3-3, Fig. 2.

In the drawing numeral 1' represents a cylindrical member whose interior forms the combustion chamber of the'heater to which the burner is connected. One end of cylinder 1 is secured in the hub 2 of a castin which also forms part of the heater which ias not been shown in this application but which has been full described in the ap lication above identifie The outer end or hub 2 is rovidedwith a threaded section 3 with w 'ich 7 the outer-threaded surface of the flange 4 co-operates. Flange 4 has a central opening 5 through'which the tubular member 6 of the burner extends and to which it is attached by being welded thereto. 1 Tubular member 6 has its inner end provided witha conical portion 7 to the inner surface of which a plurality of helicallyarranged blades 8 are attached. These blades form a set and serve to give the mixture of air and fuel a rotary 8o motion as it is discharged from the burner. The other end of the burner is provided with a set of helical blades 8 similar to the ones at the discharge end. These two sets of deflec tor blades are spaced a short distance apart, and located within the space between these deflector blades is a propeller 9. This propeller is provided with a pluralit of blades 10 and is rotatably mounted on a aring 11. This bearing is hollow and forms one end of an L. Nut 12 is threadedly attached to the bearing 11 and serves to hold the propeller in place. This nut isrplrovided with a pluralit of openings 13. e other end of the L is attached to the inner end of the pipe 14. This pipe extends through the tube 6 and is welded in place. When the parts are assembled in the manner shown the pro eller is free to rotate about an axis coinci out with the axis of the tubular member 6. The L is hollow m toward the burner, or it may be delivered to the burner by means of a pump. Where gas is use as fuel ipe 14 is connected to a container in whic the gas is contained under pressure. A globe or other-valve 17 is attached to the outer end of the tubular memher 6 and connectsthe latter with a conduit 18 that extends to the discharge port of the centrifugal fan 19. The impeller within the fan may be rotated by any suitable means, and whenever the valve 17 is open air will flow from the fan through the conduit 18 through valve 17 and thence through the burner into the combustion chamber. It is evident that the stream of air will be given a rotary motion by the action of the deflecto'r blades that are located near the intake end ofthe burner, and when this rotating stream of air strikes the propeller blades, the latter will start to rotate, thereby causin the air to be greatly agitated. When the urner is in operation liquid fuel is fed to the interior through the pipe 14 and is discharged through the openings 13 in nut 12. This fuel will be entrained by the air and will be thoroughly mixed with the latter, due to the agitation causedby the propeller blades and this mixture will be further increased by the action of the deflector blades near the discharge end of the burner. It will be underig. 1. The

From the above descriptionit will be apparent that I have produced a burner of a very simple construction, that can be cheaply manufactured, and which will effect a thorough mixture between the air and the fuel so as to obtain the greatest ossible thermal efiiciency from the fuel. A though the burner is primarily intended for use with liquid fuel such as fuel oil, it is, of course,

possible to use it in connection with naturalgas or any other gas as this can be readily substituted for the liquid fuel and the valves ad'usted so as to get the proper mixture.

- aving described the invention, what I claim as new is:

A burnerfor use with fuel in fluid form, comprising a tubular member, means: for delivering air under pressure to oneend there-' of, two sets' of he'hcally arranged deflectors spaced apart within the tubular member, a propeller rotatably mounted within the tubular member between the two sets of deflectors, and means for delivering fuel in fluid form and under pressure, to the interior of the tubular member between the first set of deflectors and the propeller and in a direction opposed to the travel of the air current through the tubularmember.

In testimony whereof I aflix my signature.

WILLIAM A. J. KREAGER.

stood that the air pressure from the fan 19' must be so regulated with reference to the pressure on the fuel as it is fed into the. tube 6 through the perforations in the nut 12, that the air pressure will not cut off the fuel discharge. In other words, the fuel pressure I no and the air pressure must be so'regulated as to cooperate in the performance of the required function and to produce the desired result. By properly proportioning the fuel and-air a mixture will. be produced which will burn with a very intense heat. The mixture is ignited by means of a spark plug 20 which is located in the wall of flange and it may be connected to the high potential side of an induction coil in the usual manner.

The wall offlange 4 is also provided with an opening 21 which is normally closed by means of a plug 22. By removing the plug 22 the operator can see the interior of the combustion chamber and observe the character of the flame. This enables him to adjust the mixture so as to get the most effective combination. 

